Jet pipe for



P. STEIN Re. 21,469

JET PIPE FOR FIRE EXTINGUISHING PURPOSES WITH A WIDENING MOUTHP IEC B May 28, 1940.

Original Filed Sept. 25, 1935 Pin/L STE/(V M; Itforny.

Reiacu'ed May as, 1940 I Re. 21,469

PAT NT emce- JET PIPE FORIFIBE EXTINGUISHING PUR- POSES WITH AWIDENING MOUTHPIECE Paul Stein, deceased, late of Moser, near lilagdeb fg, Germany, by Elisabeth Stein, heir, Moser,

cation for reissue 286,036

10 Claims.

tinguishing purposes'with a widening mouthfor fire extinguishing purposes has become considerably larger in recent times in so far as with the jet pipes not only burning buildings have to be extinguished but they are also intended for fighting fires of other kinds, such as confiagra-- tion of a forest, of easily inflammable liquids,

and further gases having to be suppressed.

For such purposes the usual full jet cannot be employed, which is thrown on to burning objects, but a conical water spray has to be formed which shuts off the scene of a conflagration and rapidly extinguishes the fire. 0n the other hand, the jet pipe must be of simple construction, 1. e., comprise only very few movable parts, and the shape of the jet pipe must be such that the manufacturing is not expensive.

All this is attained with the jet pipe according to the invention, which consists of only two mutually adjustable parts, the outer nozzle-like part,,the mouthpiece of which is widened in the simplest shape of a straightly extending cone surface, and of an insert fixed on a pipe section and adapted to be turned and shifted in the mouthpiece.

The insert consists preferably of a shaft to be screwed into the pipe section and having an enlarged head portion of, ,for instance, cylindrical or somewhat conical shape and merging into the shaft by a bulged surface. By adjusting this insert relative to the conical mouthpiece ,of the jet pipe conical water sprays of various cone-angle can be produced without the insert projecting beyond the rim of the nozzle body. It the insert is screwed back it engages with a cylindrical portion of the nozzle body and, in this position of the insert, a cylindrical hollow jet can be produced.

The narrowing in the nozzle body has a supporting suriace, shoulder, or seat, for the head of the jet pipe can be shut off completely. This is jet pipe gradually opens the same and consequently the force of reaction, which under circumstances has thetendency to alter the direction of the jet pipe, is gradually increased. The fireman or person handling the jet pipe can acjet the position of the jet pipe in the hand of the operator be automatically altered.

1'0 make the jet pipe as light as possible, it

The invention relates to a jet pipe for fire expiece. The range of application of the jet pipes such as petroleum, oils, varnishes and the like,

the insert or baflle member to seat upon, so that essential in so far as the person who handles the curately adjust it onthe scene of confiagration without the danger that at the opening of the near Magdeburg, Germany Original No. 2,089,304, dated August 10, 1937, Serial No. 42,043, September 25, 1935.

July 22, 1939. Serial No.

Appli must be made of light metahthe mutually movable parts, for instance the screw thread for the adjusting of the jet pipe being of harder metal. whereas for the supporting surface of the insert on the nozzle body special packing material, such as Babbitt metal, is used.

An embodiment of the invention is'illustrated by way of example on the accompanying drawing in which: Fig. 1 shows the jet pipe in longitudinal setion.

Fig, 2 is across section on AA of Fig. 1. :The jet pipe consists of the nozzle body, made of light metal, such as aluminium or of a combination of aluminium, silumin or the like. The rear part I- of the nozzle body is cylindrical and serves as guide for the cylindrical part 2 to be screwed on the hose. From the cylindrical part I of the nozzle body extends a conical part I in the rim of which a packing l of Babbitt metal is inserted. The mouthpiece i may have a rubber ring 6 in the outer surface of itslrim.

The upper face I of the mouthpiece is conical and connected with'a cylindrical portion 9 by a short transition cone 8. Into a'hub ll of the cyrelative to the conical faces I and I water sprays in the shape of cones with different angle are produced.

If the. insert piece II is screwed back so that the head I2 is in the cylindrical bore 8, a cylindrical hollow jet is forced out through the jet pipe. If the insert piece II is screwed back completely, the head I2 rests tightly upon the insert-l of Babbitt metal. 1

The adjusting of insert body to the nozzle is effected by turning the nozzle. The nonle has on its rear, cylindrical part I a screw threaded sleeve ll of brass or the like, .whereasa guide plate i5 of steel is provided in the cylindrical part 2, projections of this plate engaging with the screw thread of the" sleeve I. A packing the cylindrical part 2. For 'stifl'ening the nozzle longitudinal ribs I! are provided merging at the.

top into .the lower surface of thewidened nozzle head.

It will be seen that my improvedjetpipe nomle includes two parts, one mounted on the other for longitudinal adjustment thereon. 'Ihat is, is the cylinder or cylindrical-part upon which is mounted an end piece for longitudinal adjustment thereon. The end piece, it will be seen, has a flaring outlet and a substantially cylindrical passageway 9. Back of the latter is a shoulder or seat in which I have shown in the present embodiment of the invention the insertion of packing 4. The cylinder, above mentioned, carries with it the baille member I! as the same is adjusted forwardly or backwardly. The baille member is attached to the cylinder by its shank. At the outer end of the shank the baflle member carries the enlarged circular cylindrical head I! which is connected tothe shank by the concave or curved surface ll.

I claim:

1. In a jet pipe nozzle: a cylinder; an end piece mounted on the cylinder for longitudinal adjustment thereon, said end piece being provided with a flaring outlet, a shoulder, and a substantially cylindrical passageway between the shoulder and the outlet; and a baille member with an enlarged circular head and a supporting shank attached to said cylinder; whereby, by relative longitudinal adjustment of said cylinder with respect to said and the substantially cylindrical passageway oi end piece, the head of said shank may be caused to seat on said shoulder to shut off the nozzle, or moved to a position-in said cylindrical passageway to give a straight stream, or moved out into said flaring outlet to give a widely divergent spray.

2. Apparatus as claimedin claim 1 in which the head on the baille' member is cylindrical.

3. Apparatus as claimed in claim 1 in which the head and shank of the baiile member are joined by a curved surface.

4. Apparatus acclaimed in claim 1 in which there is a conical face between the flaring outlet the end piece.

5. Apparatus as claimed in claim 1. in which the shoulder is provided with a packing member.

6. Apparatus as claimed in claim 1 in which the end piece is threaded on the cylinder to provide the mounting permitting longitudinal adjustment.

7. In a jet pipe nozzle: a cylinder; an end piece mounted on the cylinder for longitudinal adjustment thereon, said end piece being provided with a flaring outlet, a substantially cylindrical passageway behind the outlet, and an annular interior restriction, back of the cylindrical passageway, forming a shoulder; and a bailie member with an enlarged circular head and a supporting shank attached to said cylinder; whereby,

by relative longitudinal adjustment of said cylan enlarged circular head and a supporting'shank inder with respect to said end piece, the head of said shank may be moved to a position in said cylindrical passageway to give a straight stream. or moved out into said flaring outlet to give a widely divergent spray.

8. In a jet pipe nozzle: a cylinder; an end piece mounted on the cylinder for longitudinal adjust: ment thereon, said end piece being provided with a flaring outlet, a substantially cylindrical pas sageway behind the outlet, and an annular interior restriction, back of the cylindrical passageway, forming a shoulder; and a baille member with an enlarged circular head and a supporting shank attached to said cylinder; whereby, by relative longitudinal adjustment oi said cylinder with respect to said end piece, the head of said shank may be caused to approach said shoulder to re-- strict the flow of the nozzle, or moved to a position in said cylindrical passageway to give a straight stream, or moved out into said flaring outlet to give a widely divergent spray.

9. In a jet pipe nozzlez'a cylinder; an end piece mounted on the cylinder for longitudinal adjustment thereon, said end piece being provided with an outlet, a substantially cylindrical passageway behind the outlet, and an annular interior restriction, back of the cylindrical passageway, forming a shoulder; and a baiile member with attached to said cylinder; whereby, by relative longitudinal adjustment of said cylinder with respect to said end piece, the head 01' said shank may be moved to a position in said cylindrical passageway to give a straight stream, or moved to a position adjacent said outlet to give a widely divergent spray. I 1

10. In a jet pipe nozzle: a cylinder; an end piece mounted on the cylinder for longitudinal adjustment thereon, said end piece being provided with an outlet, a substantially cylindrical passageway behind the'cutlet, and an annular interiorrestriction, back of the cylindrical passageway, forming a shoulder; and a baflle member with an enlarged circular head and a supporting shank attached to said cylinder; whereby, by relative longitudinal adjustment of said cylinder with respect to said endv piece, the head of said shank may be caused to approach said shoulder to restrict the flow of the nozzle, or moved to a position in said cylindrical passageway to give a straight stream, or moved to a position adjacent said outlet to give a widelydivergent spray.

. ELISABETH STEIN. Heir of the Estate of Paul Stein, Deceased. 

